Portal 2 Chapter 2 Test Chamber 7

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Chapter 2 - Test Chamber 07

sp_a2_pit_flings.bspPit Flings

This is the sixteenth level of the game, and takes place within a dilapidated Test Chamber. This level requires the player to utilize their knowledge of the Thermal Discouragement Beam, Buttons and momentum in order to successfully solve the Test Chamber. This level is also unique in that it features a damaged Emancipation Grid, which allows the player to unlock the "Preservation of Mass" achievement. The Weighted Companion Cube is also introduced here.

Video walkthrough

Trivia

Use the Companion Cube to block the beam then run to the wall by the victory lift and you can pull Wheatley from the wall.
He will not activate the button nor talk to you, but he can be used to block the beam if dropped face down.

If you place a portal on the wall past the broken Material Emancipation Grill, you can then retrieve the Companion Cube. However, before you enter the lift, GLaDOS will fizzle the cube and say "I think that one was about to say 'I love you.' They're sentient, of course. We just have a lot of them."